/*
This file is part of GraphLab.

GraphLab is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as 
published by the Free Software Foundation, either version 3 of 
the License, or (at your option) any later version.

GraphLab is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public 
License along with GraphLab.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef GRAPHLAB_HASH_FUNCTIONS_HPP
#define GRAPHLAB_HASH_FUNCTIONS_HPP

namespace graphlab {
  /**
  \ingroup util_internal
  A hash function to maps a value to itself
  */
  class identity_hash{
  public:
    size_t operator()(const size_t &t) const{
      return t;
    }
  };
}
#endif

